Blind nailing device



, (Nomaden) N. BRUNBS. BLIND NAILING DEVICE.

No. 554,908. Patented Feb. 18.1896.

@yi/i .19H-Wwe?, 'M v @MMM @IQ/ UNITED STATES PATENT EEIcE.

NELS BRUNES, OF MINNEAPOLIS, MINNESOTA.

BLIND NAILING DEVICE.

SPECIFICATION forming part of Letters Patent No. 554,908, dated February 18, 1896.

Application filed March 30, 1895. Serial No. 543,815. (No model.)

To all whom it may concern:

Be it known that I, NELS BRUNES, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Blind Nailing Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved blind nailing device, which is especially adapted for sidewalks and bridge use, but is capable for general application wherever it is desired to secure planks or other wooden pieces together and to the sills, bed, backing, or other support for the same below the level of the face of the planks.

To these ends my invention consists of the novel features of construction hereinafter described and defined in the claims.

The accompanying drawings illustrate my invention, wherein, like letters referring to like parts throughout the several views- Figure l is a perspective view showing my device as applied in use, some parts being broken away. Fig. 2 is a perspective view showing the blind nailing device shown in Fig. 1 detached, with one of the parts thereof in full and the other in dotted lines; and Fig. 3 is a detail in section and perspective taken on the line X X of Fig. 2.

In the accompanying drawings my invention is illustrated as applied to a wooden sidewalk, and therein CL a represent a pair of sills or other ground-supports, to which the transverse planks a are secured by my blind nailing device to form a wooden sidewalk which will be free from any projecting nails or other securing devices above the face-level of the planks. The blind nailing device is marked with letters cb b' 52193 b4 b5. Of these parts the two brad-points b2 and b3 are in the same plane and are formed integral with the body portions o b b4 of the brad, but are offset from each other to form the shoulder or drivinghead b. The body portion b of the brad is provided with a chisel edge or wedge portion b4 on the side of the same adjacent to the point or arm b2. The body portion b/ is also -provided with an eye or nail-passage b5.

c represents a nail which when the device is placed in working position passes through the eye b5 of the horizontal brad.

When applied as shown in the accompanying drawings, the parts b2 b4 are driven into the last-laid plank,below the level of the same, until the shoulder or driving-head b is flush with the joint-surface of the plank. The nail c is then driven through the eye b5 into the sill a. One of these devices is thus applied to each end of the plank. The next ad jacent plank is then laid and joined to the preceding plank by driving the same onto the projecting points hof the brads. When this is done the planks will be securely fastened together and to the sills, as is clearly shown `in Fig. 1 of the drawings.

With this form of device the brad cannot be displaced by becoming loose in its seat, and if the planks are well joined the head of the nail c will be sufficiently embedded in the joint-surfaces of the adjacent planks to prevent the same from rising through the joint between said planks in case the said nail c should become loose in its seat.

Attention is called to the fact that the wedge portion b4 of the brad, where driven into the edge of the laid plank, prevents the turning of said brad under the action of driving the nail c through the same int-o its working position.

From the foregoing statements it is obvious that this form of blind nailing device is especially adapted for use on sidewalks and bridges or other platforms where loose and projecting nails are so frequently the cause of accidents and serious injuries.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

l. A blind nailing device, comprising the double-ended perforated brad, the points of which project in opposite directions, provided with an offset to form the driving-head or shoulder, and the co-operating nail working through said perforated brad, at a right ansztid perforated brad, at aright angle thereto,

gie thereto, substantially as described. substantially as described. 1o

2. A blind nailing device, comprising the In testimony whereof I adx my signature double-ended perforated brad, the points of in presence of two witnesses.

which proj eotin opposite directions, provided NELS BRUNES.

With an offset to form the driving-head or shoulder and the chisel or Wedge portion,

and the cooperating nail Working through Witnesses JAS. F. WILLIAMSON, E. F. ELMORE.' 

